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Use of Uninitialized Resource Affecting libcurl package, versions <0:7.76.1-7.amzn2.0.2

medium

Snyk CVSS

    Attack Complexity High
    User Interaction Required

    Threat Intelligence

    EPSS 0.3% (69th percentile)
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NVD
5.3 medium
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SUSE
4.3 medium
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Red Hat
3.1 low

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  • Snyk ID SNYK-AMZN2-LIBCURL-1702430
  • published 27 Sep 2021
  • disclosed 5 Aug 2021
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Introduced: 5 Aug 2021

CVE-2021-22925 Open this link in a new tab
CWE-908 Open this link in a new tab

How to fix?

Upgrade Amazon-Linux:2 libcurl to version 0:7.76.1-7.amzn2.0.2 or higher.
This issue was patched in ALAS2-2021-1700.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libcurl package and not the libcurl package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2 relevant fixed versions and status.

curl supports the -t command line option, known as CURLOPT_TELNETOPTIONSin libcurl. This rarely used option is used to send variable=content pairs toTELNET servers.Due to flaw in the option parser for sending NEW_ENV variables, libcurlcould be made to pass on uninitialized data from a stack based buffer to theserver. Therefore potentially revealing sensitive internal information to theserver using a clear-text network protocol.This could happen because curl did not call and use sscanf() correctly whenparsing the string provided by the application.

References